<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>148.CSS脉冲和火箭动画特效</title>
  <link href="./style.css" rel="stylesheet">
</head>
<body>
  <div class="pulse">
    <span style="--i:1;"></span>
    <span style="--i:2;"></span>
    <span style="--i:3;"></span>
    <span style="--i:4;"></span>
    <span style="--i:5;"></span>

    <div class="rocket">
      <img src="rocket.png" alt="">
    </div>
  </div>
</body>
</html>